package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RegexUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.servlet.http.HttpSession;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.*;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Slf4j
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private StringRedisTemplate redisTemplate;

    /**
     * 发送验证码
     * @param phone
     * @param session
     * @return
     */
    @Override
    public Result sendCode(String phone, HttpSession session) {
        //1.检验手机号格式
        if (RegexUtils.isPhoneInvalid(phone)){
            //2.不符合 返回错误信息
            return Result.fail("手机号格式错误");
        }
        //3.符合 生成验证码
        String code = RandomUtil.randomNumbers(6);
        //4.保存验证码到redis
        redisTemplate.opsForValue().set(LOGIN_CODE_KEY+phone,code,LOGIN_CODE_TTL, TimeUnit.MINUTES);
        //5.发送验证码
        log.debug("发送验证码成功 验证码：{}",code);
        //返回ok
        return Result.ok();
    }

    /**
     * 登录功能
     * @param loginForm
     * @param session
     * @return
     */
    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        //1.检验手机号
        if (RegexUtils.isPhoneInvalid(loginForm.getPhone())){
            //2.不符合 返回错误信息
            return Result.fail("手机号格式错误");
        }

        //2.检验验证码
        String cacheCode = redisTemplate.opsForValue().get(LOGIN_CODE_KEY + loginForm.getPhone());
        String code = loginForm.getCode();

        //3.不一致 报错
        if (cacheCode==null || !cacheCode.toString().equals(code)){
            return Result.fail("验证码有误");
        }

        //4.一致 根据手机号查询用户
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("phone",loginForm.getPhone());
        User user = userMapper.selectOne(queryWrapper);
//        User user = query().eq("phone", loginForm.getPhone()).one();
        //5.判断用户是否存在
        if (user==null){
            //6.不存在 创建新用户并保存
            user=creatUserWithPhone(loginForm.getPhone());
        }

        //生成随机token 作为登录令牌
        String token = UUID.randomUUID().toString(true);
        //将user对象转为hash储存
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        Map<String, Object> map = BeanUtil
                .beanToMap(userDTO,new HashMap<>()
                        , CopyOptions.create()
                                .setIgnoreNullValue(true)
                                .setFieldValueEditor((fieldName,fieldValue)->fieldValue.toString()));
        //储存到redis
        redisTemplate.opsForHash().putAll(LOGIN_USER_KEY+token,map);
        //设置有效期
        redisTemplate.expire(LOGIN_USER_KEY+token,LOGIN_USER_TTL,TimeUnit.MINUTES);
        //7.存在 保存用户到session中
        return Result.ok(token);
    }

    /**
     * 创建用户方法
     * @param phone
     * @return
     */
    private User creatUserWithPhone(String phone) {
        //1.创建用户
        User user = new User();
        user.setPhone(phone);
        user.setNickName("HM_"+String.valueOf(System.currentTimeMillis()));
        //2.将用户保存到数据库中
        userMapper.insert(user);
        return user;
    }
}
